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Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

2022 Infiniti QX60 fully revealed with vastly improved design

After a "concept" was shown last September, the significantly redesigned 2022 Infiniti QX60 has finally been revealed. And inside and out, it's a huge design improvement. It has a more traditional SUV exterior, with a much more modern and luxurious-looking interior complete with an infotainment system from this decade. As expected, the production QX60 looks just like the concept, and that's good in our book. It has a boxier, more confident shape but still with the brand's signature curvy detailing. The new two-tone paint is only available on the top-level Autograph trim, though. Interestingly, the new QX60 has the same wheelbase as the crossover it replaces, though it's overall two inches shorter and about an inch taller. Perhaps not surprisingly, the QX60's interior doesn't seem to have changed in size much. Only cargo space has been announced, and while it has 1.4 cubic feet more space with the third row folded, space is down by between 0.4 and 1.4 cubic feet behind the first row and the third row respectively. Space wasn't really the QX60's interior weakness, though — that was in the extremely dated design. Fortunately, the new model tosses everything from the old one out the window. It now has a low, flowing dash that helps provide a more airy feeling. It has the en vogue full-width air vents. It's particularly fetching in Autograph trim as shown above with semi-aniline quilted leather and open-pore wood trim. The infotainment is updated and features a 12.3-inch touchscreen. It can be matched with an available 12.3-inch instrument screen and a 10.8-inch head-up display. Infiniti has added additional sound-deadening, too, and among the standard features are a panoramic sunroof, three-zone automatic climate control, eight-way power heated seats, wireless Apple CarPlay, wired Android Auto and seating for seven. The Autograph swaps the second-row bench for captain's chairs. Powering the new QX60 is a tried-and-true 3.5-liter V6 making the same 295 horsepower and 270 pound-feet of torque as before. But, like its cousin the Nissan Pathfinder, it's now connected to a nine-speed automatic transmission, which also bumped towing capacity up to 6,000 pounds. Front-wheel drive is standard with all-wheel drive available on all trim levels. Infiniti says the all-wheel-drive system has been reworked for faster engagement, and it's able to send up to half of the engine's power to the rear wheels.

Infiniti Q70 adds long-wheelbase model, fresh looks for 2015

After all the work done for the Q50, Infiniti has finally given some attention to its flagship sedan, the Q70 (or, for those that refuse to use the brand's latest nomenclature, the M). While the refreshed sedan sports a few visual tweaks, the big bit of news is that it's the first vehicle in its segment to offer both long- and a short-wheelbase options (keep in mind, both BMW and Audi offer LWBs in China, but not in the US).
Infiniti has stretched the standard car's 114.2-inch wheelbase to 120.1 inches, lengthening the car 7.3 inches overall. Nearly the entire wheelbase increase is dedicated to rear-seat legroom, with a substantial increase of 5.6 inches overall. As for the effect the stretching had on the Q70's looks, well, we actually think it might look better with the longer wheelbase.
It's a nice change of proportions that is complemented by the fresh looks of the facelifted Q70. New head and taillights are the biggest changes, with full LEDs in the back and LED accents in front. There's certainly a bit of Q50 in the front, thanks to both the headlights and the new "double-arch" grille, complete with mesh-finish inserts. In the cabin, material quality looks to remain impressive, with Infiniti's cool silver-dust wood trim being shown off in the press images. Outside of that, interior changes are kept to a minimum.